Hi, I am preparing liposomes with drug loaded inside them. I would like to quantify the drug inside them through HPLC. There is an established HPLC method for that drug.Somehow I am not able to see the drug peak, and many other peaks are coming up ( I am able to see the peak with standards but not with the liposomes). I speculate this may be due to phospholipid interference. For extracting the drug from liposomes, I am using methanol as drug is soluble in it. Any suggestions please?